Brand, new sed that uses libc regex routines.
There is some common code used by both sed & grep that should be put into utility.c as per Mat Kraai's suggestions/patch on the mailing list. Specifically, a common regex_compile() and a regex_subst() function need to be made.
This commit is contained in:
Mark Whitley
parent
85c552035e
commit
6315ce603b
773
editors/sed.c
773
editors/sed.c
@ -1,15 +1,8 @@
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/* vi: set sw=4 ts=4: */
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/*
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/*
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* Mini sed implementation for busybox
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* sed.c - very minimalist version of sed
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*
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*
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*
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* Copyright (C) 1999,2000 by Lineo, inc.
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* Copyright (C) 1999,2000 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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* Written by Mark Whitley <markw@lineo.com>, <markw@enol.com>
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*
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* Modifications for addresses and append command have been
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* written by Marco Pantaleoni <panta@prosa.it>, <panta@elasticworld.org>
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* and are:
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* Copyright (C) 1999 Marco Pantaleoni.
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* it under the terms of the GNU General Public License as published by
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@ -27,333 +20,543 @@
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*
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*
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*/
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*/
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#include "internal.h"
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/*
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#include "regexp.h"
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Supported features and commands in this version of sed:
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- comments ('#')
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- Address matching: num|/matchstr/[,num|/matchstr/|$]command
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- Commands: p, d, s/match/replace/[g]
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(Note: Specifying an address (range) to match is *optional*; commands
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default to the whole pattern space if no specific address match was
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requested.)
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Unsupported features:
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- transliteration (y/source-chars/dest-chars/) (use 'tr')
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- no support for characters other than the '/' character for regex matches
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- no pattern space hold space storing / swapping (x, etc.)
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- no labels / branching (: label, b, t, and friends)
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- and lots, lots more.
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*/
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#include <stdio.h>
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#include <stdio.h>
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#include <dirent.h>
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#include <stdlib.h> /* for realloc() */
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#include <unistd.h> /* for getopt() */
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#include <regex.h>
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#include <string.h> /* for strdup() */
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#include <errno.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <ctype.h> /* for isspace() */
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#include <signal.h>
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#include "internal.h"
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#include <time.h>
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#include <ctype.h>
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/* externs */
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extern int optind; /* in unistd.h */
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extern char *optarg; /* ditto */
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/* options */
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static int be_quiet = 0;
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struct sed_cmd {
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/* address storage */
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int beg_line; /* 'sed 1p' 0 == no begining line, apply commands to all lines */
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int end_line; /* 'sed 1,3p' 0 == no end line, use only beginning. -1 == $ */
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regex_t *beg_match; /* sed -e '/match/cmd' */
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regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */
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/* the command */
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char cmd; /* p,d,s (add more at your leisure :-) */
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/* substitution command specific fields */
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regex_t *sub_match; /* sed -e 's/sub_match/replace/' */
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char *replace; /* sed -e 's/sub_match/replace/' XXX: who will hold the \1 \2 \3s? */
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unsigned int sub_g:1; /* sed -e 's/foo/bar/g' (global) */
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};
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/* globals */
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static struct sed_cmd *sed_cmds = NULL; /* growable arrary holding a sequence of sed cmds */
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static int ncmds = 0; /* number of sed commands */
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/*static char *cur_file = NULL;*/ /* file currently being processed XXX: do I need this? */
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static const char sed_usage[] =
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static const char sed_usage[] =
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"sed [-n] -e script [file...]\n"
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"sed [-Vhnef] pattern [files...]\n"
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#ifndef BB_FEATURE_TRIVIAL_HELP
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#ifndef BB_FEATURE_TRIVIAL_HELP
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"\nAllowed sed scripts come in the following form:\n"
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"\n"
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"\t'ADDR [!] COMMAND'\n\n"
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"-n\tsuppress automatic printing of pattern space\n"
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"\twhere address ADDR can be:\n"
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"-e script\tadd the script to the commands to be executed\n"
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"\t NUMBER Match specified line number\n"
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"-f scriptfile\tadd the contents of script-file to the commands to be executed\n"
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"\t $ Match last line\n"
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"-h\tdisplay this help message\n"
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"\t /REGEXP/ Match specified regexp\n"
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"-V\toutput version information and exit\n"
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"\t (! inverts the meaning of the match)\n\n"
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"\n"
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"\tand COMMAND can be:\n"
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"If no -e or -f is given, the first non-option argument is taken as the\n"
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"\t s/regexp/replacement/[igp]\n"
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"sed script to interpret. All remaining arguments are names of input\n"
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"\t which attempt to match regexp against the pattern space\n"
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"files; if no input files are specified, then the standard input is read.\n"
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"\t and if successful replaces the matched portion with replacement.\n\n"
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"\t aTEXT\n"
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"\t which appends TEXT after the pattern space\n"
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"Options:\n"
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"-e\tadd the script to the commands to be executed\n"
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"-n\tsuppress automatic printing of pattern space\n\n"
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#if defined BB_REGEXP
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"This version of sed matches full regular expressions.\n";
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#else
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"This version of sed matches strings (not full regular expressions).\n"
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#endif
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#endif
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#endif
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;
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;
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/* Flags & variables */
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#if 0
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/* Nuke from here { */
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typedef enum { f_none, f_replace, f_append } sed_function;
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#define NO_LINE -2
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/* get_line_from_file() - This function reads an entire line from a text file
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#define LAST_LINE -1
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* * up to a newline. It returns a malloc'ed char * which must be stored and
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static int addr_line = NO_LINE;
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* * free'ed by the caller. */
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static char *addr_pattern = NULL;
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extern char *get_line_from_file(FILE *file)
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static int negated = 0;
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#define SKIPSPACES(p) do { while (isspace(*(p))) (p)++; } while (0)
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#define BUFSIZE 1024
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static inline int at_last(FILE * fp)
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{
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{
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int res = 0;
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static const int GROWBY = 80; /* how large we will grow strings by */
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if (feof(fp))
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return 1;
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else {
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int ch;
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int ch;
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int idx = 0;
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char *linebuf = NULL;
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int linebufsz = 0;
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if ((ch = fgetc(fp)) == EOF)
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while (1) {
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res++;
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ch = fgetc(file);
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ungetc(ch, fp);
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if (ch == EOF)
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break;
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/* grow the line buffer as necessary */
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if (idx > linebufsz-2)
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linebuf = realloc(linebuf, linebufsz += GROWBY);
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linebuf[idx++] = (char)ch;
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if ((char)ch == '\n')
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break;
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}
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}
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return res;
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if (idx == 0)
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return NULL;
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linebuf[idx] = 0;
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return linebuf;
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}
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}
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static void do_sed_repl(FILE * fp, char *needle, char *newNeedle,
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static void usage(const char *string)
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int ignoreCase, int printFlag, int quietFlag)
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{
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{
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int foundOne = FALSE;
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printf("usage: %s\n", string);
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char haystack[BUFSIZE];
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exit(0);
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int line = 1, doit;
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}
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while (fgets(haystack, BUFSIZE - 1, fp)) {
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/* } to here when we integrate this into busybox */
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doit = 0;
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#endif
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if (addr_pattern) {
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doit = !find_match(haystack, addr_pattern, FALSE);
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} else if (addr_line == NO_LINE)
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doit = 1;
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else if (addr_line == LAST_LINE) {
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if (at_last(fp))
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doit = 1;
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} else {
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if (line == addr_line)
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doit = 1;
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}
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if (negated)
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doit = 1 - doit;
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if (doit) {
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foundOne =
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replace_match(haystack, needle, newNeedle, ignoreCase);
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if (foundOne == TRUE && printFlag == TRUE) {
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static void destroy_cmd_strs()
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fprintf(stdout, haystack);
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{
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if (sed_cmds == NULL)
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return;
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/* destroy all the elements in the array */
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while (--ncmds >= 0) {
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if (sed_cmds[ncmds].beg_match) {
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regfree(sed_cmds[ncmds].beg_match);
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free(sed_cmds[ncmds].beg_match);
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}
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}
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if (sed_cmds[ncmds].end_match) {
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regfree(sed_cmds[ncmds].end_match);
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free(sed_cmds[ncmds].end_match);
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}
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if (sed_cmds[ncmds].sub_match) {
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regfree(sed_cmds[ncmds].sub_match);
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free(sed_cmds[ncmds].sub_match);
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}
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if (sed_cmds[ncmds].replace)
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free(sed_cmds[ncmds].replace);
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}
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}
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if (quietFlag == FALSE) {
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/* destroy the array */
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fprintf(stdout, haystack);
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free(sed_cmds);
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sed_cmds = NULL;
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}
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static void exit_sed(int retcode, const char *message)
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{
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destroy_cmd_strs();
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if (message)
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fputs(message, stderr);
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exit(retcode);
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}
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/*
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* trim_str - trims leading and trailing space from a string
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*
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* Note: This returns a malloc'ed string so you must store and free it
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* XXX: This should be in the utility.c file.
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*/
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static char *trim_str(const char *str)
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{
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int i;
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char *retstr = strdup(str);
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/* trim leading whitespace */
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memmove(retstr, &retstr[strspn(retstr, " \n\t\v")], strlen(retstr));
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/* trim trailing whitespace */
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i = strlen(retstr) - 1;
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while (isspace(retstr[i]))
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i--;
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retstr[++i] = 0;
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/* Aside:
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*
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* you know, a strrspn() would really be nice cuz then we could say:
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*
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* retstr[strlen(retstr) - strrspn(retstr, " \n\t\v") + 1] = 0;
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*/
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return retstr;
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}
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/*
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* index_of_unescaped_slash - walks left to right through a string beginning
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* at a specified index and returns the index of the next unescaped slash.
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*/
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static int index_of_next_unescaped_slash(int idx, const char *str)
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{
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do {
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idx++;
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/* test if we've hit the end */
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if (str[idx] == 0)
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return -1;
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} while (str[idx] != '/' && str[idx - 1] != '\\');
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return idx;
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}
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/*
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* returns the index in the string just past where the address ends.
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*/
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static int get_address(const char *str, int *line, regex_t **regex)
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{
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char *my_str = strdup(str);
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int idx = 0;
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if (isdigit(my_str[idx])) {
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do {
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idx++;
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} while (isdigit(my_str[idx]));
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my_str[idx] = 0;
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*line = atoi(my_str);
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*regex = NULL;
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}
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else if (my_str[idx] == '$') {
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*line = -1;
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*regex = NULL;
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idx++;
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}
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else if (my_str[idx] == '/') {
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int ret;
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idx = index_of_next_unescaped_slash(idx, my_str);
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if (idx == -1) {
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free(my_str);
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exit_sed(1, "sed: unterminated match expression\n");
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}
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my_str[idx] = 0; /* shave off the trailing '/' */
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my_str++; /* shave off the leading '/' */
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*regex = (regex_t *)malloc(sizeof(regex_t));
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if ((ret = regcomp(*regex, my_str, 0)) != 0) {
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/* error handling if regular expression couldn't be compiled */
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int errmsgsz = regerror(ret, *regex, NULL, 0);
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char *errmsg = malloc(errmsgsz);
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if (errmsg == NULL) {
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exit_sed(1, "sed: memory error\n");
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|
}
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regerror(ret, *regex, errmsg, errmsgsz);
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fprintf(stderr, "sed: %s\n", errmsg);
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free(errmsg);
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exit_sed(1, NULL);
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}
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my_str--; /* move my_str back so free() (below) won't barf */
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idx++; /* advance idx one past the end of the /match/ */
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|
}
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else {
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|
fprintf(stderr, "sed.c:get_address: no address found in string\n");
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|
fprintf(stderr, "\t(you probably didn't check the string you passed me)\n");
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idx = -1;
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}
|
}
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line++;
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free(my_str);
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return idx;
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|
}
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|
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static void parse_cmd_str(struct sed_cmd *sed_cmd, const char *cmdstr)
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|
{
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int idx = 0;
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|
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/* parse the command
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* format is: [addr][,addr]cmd
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* |----||-----||-|
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* part1 part2 part3
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*/
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/* first part (if present) is an address: either a number or a /regex/ */
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if (isdigit(cmdstr[idx]) || cmdstr[idx] == '/')
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|
idx = get_address(cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
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|
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/* second part (if present) will begin with a comma */
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|
if (cmdstr[idx] == ',')
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|
idx += get_address(&cmdstr[++idx], &sed_cmd->end_line, &sed_cmd->end_match);
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|
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/* last part (mandatory) will be a command */
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|
if (cmdstr[idx] == '\0')
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exit_sed(1, "sed: missing command\n");
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|
if (!strchr("pds", cmdstr[idx])) /* <-- XXX add new commands here */
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|
exit_sed(1, "sed: invalid command\n");
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|
sed_cmd->cmd = cmdstr[idx];
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|
/* special-case handling for 's' */
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|
if (sed_cmd->cmd == 's') {
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|
int oldidx;
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|
/* format for substitution is:
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|
* s/match/replace/g
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|
* | |
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|
* mandatory optional
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|
*/
|
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|
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|
/* verify that we have an 's' followed by a 'slash' */
|
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|
if (cmdstr[++idx] != '/')
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|
exit_sed(1, "sed: bad format in substitution expression\n");
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|
|
||||||
|
/* get the substitution part */
|
||||||
|
idx += get_address(&cmdstr[idx], NULL, &sed_cmd->sub_match);
|
||||||
|
|
||||||
|
/* get the replacement part */
|
||||||
|
oldidx = idx;
|
||||||
|
idx = index_of_next_unescaped_slash(idx, cmdstr);
|
||||||
|
sed_cmd->replace = (char *)malloc(idx - oldidx + 1);
|
||||||
|
strncpy(sed_cmd->replace, &cmdstr[oldidx], idx - oldidx);
|
||||||
|
sed_cmd->replace[idx - oldidx] = 0;
|
||||||
|
|
||||||
|
/* store the 'g' if present */
|
||||||
|
if (cmdstr[++idx] == 'g')
|
||||||
|
sed_cmd->sub_g = 1;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
static void do_sed_append(FILE * fp, char *appendline, int quietFlag)
|
static void add_cmd_str(const char *cmdstr)
|
||||||
{
|
{
|
||||||
char buffer[BUFSIZE];
|
char *my_cmdstr = trim_str(cmdstr);
|
||||||
int line = 1, doit;
|
|
||||||
|
|
||||||
while (fgets(buffer, BUFSIZE - 1, fp)) {
|
/* if this is a comment, don't even bother */
|
||||||
doit = 0;
|
if (my_cmdstr[0] == '#') {
|
||||||
if (addr_pattern) {
|
free(my_cmdstr);
|
||||||
doit = !find_match(buffer, addr_pattern, FALSE);
|
return;
|
||||||
} else if (addr_line == NO_LINE)
|
|
||||||
doit = 1;
|
|
||||||
else if (addr_line == LAST_LINE) {
|
|
||||||
if (at_last(fp))
|
|
||||||
doit = 1;
|
|
||||||
} else {
|
|
||||||
if (line == addr_line)
|
|
||||||
doit = 1;
|
|
||||||
}
|
|
||||||
if (negated)
|
|
||||||
doit = 1 - doit;
|
|
||||||
if (quietFlag == FALSE) {
|
|
||||||
fprintf(stdout, buffer);
|
|
||||||
}
|
|
||||||
if (doit) {
|
|
||||||
fputs(appendline, stdout);
|
|
||||||
fputc('\n', stdout);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
line++;
|
/* grow the array */
|
||||||
|
sed_cmds = realloc(sed_cmds, sizeof(struct sed_cmd) * (++ncmds));
|
||||||
|
/* zero new element */
|
||||||
|
memset(&sed_cmds[ncmds-1], 0, sizeof(struct sed_cmd));
|
||||||
|
/* load command string into new array element */
|
||||||
|
parse_cmd_str(&sed_cmds[ncmds-1], my_cmdstr);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static void load_cmd_file(char *filename)
|
||||||
|
{
|
||||||
|
FILE *cmdfile;
|
||||||
|
char *line;
|
||||||
|
|
||||||
|
cmdfile = fopen(filename, "r");
|
||||||
|
if (cmdfile == NULL)
|
||||||
|
exit_sed(1, strerror(errno));
|
||||||
|
|
||||||
|
while ((line = get_line_from_file(cmdfile)) != NULL) {
|
||||||
|
line[strlen(line)-1] = 0; /* eat newline */
|
||||||
|
add_cmd_str(line);
|
||||||
|
free(line);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static int do_sed_command(const struct sed_cmd *sed_cmd, const char *line)
|
||||||
|
{
|
||||||
|
int altered = 0;
|
||||||
|
|
||||||
|
switch (sed_cmd->cmd) {
|
||||||
|
|
||||||
|
case 'p':
|
||||||
|
fputs(line, stdout);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case 'd':
|
||||||
|
altered++;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case 's': /* oo, a fun one :-) */
|
||||||
|
|
||||||
|
/* we only substitute if the substitution 'search' expression matches */
|
||||||
|
if (regexec(sed_cmd->sub_match, line, 0, NULL, 0) == 0) {
|
||||||
|
regmatch_t regmatch;
|
||||||
|
int i;
|
||||||
|
char *ptr = (char *)line;
|
||||||
|
|
||||||
|
while (*ptr) {
|
||||||
|
/* if we can match the search string... */
|
||||||
|
if (regexec(sed_cmd->sub_match, ptr, 1, ®match, 0) == 0) {
|
||||||
|
/* print everything before the match, */
|
||||||
|
for (i = 0; i < regmatch.rm_so; i++)
|
||||||
|
fputc(ptr[i], stdout);
|
||||||
|
/* then print the substitution in its place */
|
||||||
|
fputs(sed_cmd->replace, stdout);
|
||||||
|
/* then advance past the match */
|
||||||
|
ptr += regmatch.rm_eo;
|
||||||
|
/* and let the calling function know that something
|
||||||
|
* has been changed */
|
||||||
|
altered++;
|
||||||
|
|
||||||
|
/* if we're not doing this globally... */
|
||||||
|
if (!sed_cmd->sub_g)
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
/* if we COULD NOT match the search string (meaning we've gone past
|
||||||
|
* all previous instances), get out */
|
||||||
|
else
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* is there anything left to print? */
|
||||||
|
if (*ptr)
|
||||||
|
fputs(ptr, stdout);
|
||||||
|
}
|
||||||
|
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
return altered;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void process_file(FILE *file)
|
||||||
|
{
|
||||||
|
char *line = NULL;
|
||||||
|
static int linenum = 0; /* GNU sed does not restart counting lines at EOF */
|
||||||
|
unsigned int still_in_range = 0;
|
||||||
|
int line_altered;
|
||||||
|
int i;
|
||||||
|
|
||||||
|
/* go through every line in the file */
|
||||||
|
while ((line = get_line_from_file(file)) != NULL) {
|
||||||
|
|
||||||
|
linenum++;
|
||||||
|
line_altered = 0;
|
||||||
|
|
||||||
|
/* for every line, go through all the commands */
|
||||||
|
for (i = 0; i < ncmds; i++) {
|
||||||
|
|
||||||
|
/* are we acting on a range of matched lines? */
|
||||||
|
if (sed_cmds[i].beg_match && sed_cmds[i].end_match) {
|
||||||
|
if (still_in_range || regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0) {
|
||||||
|
line_altered += do_sed_command(&sed_cmds[i], line);
|
||||||
|
still_in_range = 1;
|
||||||
|
if (regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0)
|
||||||
|
still_in_range = 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* are we trying to match a single line? */
|
||||||
|
else if (sed_cmds[i].beg_match) {
|
||||||
|
if (regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0)
|
||||||
|
line_altered += do_sed_command(&sed_cmds[i], line);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* are we acting on a range of line numbers? */
|
||||||
|
else if (sed_cmds[i].beg_line > 0 && sed_cmds[i].end_line > 0) {
|
||||||
|
if (linenum >= sed_cmds[i].beg_line && linenum <= sed_cmds[i].end_line)
|
||||||
|
line_altered += do_sed_command(&sed_cmds[i], line);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* are we acting on a specified line number */
|
||||||
|
else if (sed_cmds[i].beg_line > 0) {
|
||||||
|
if (linenum == sed_cmds[i].beg_line)
|
||||||
|
line_altered += do_sed_command(&sed_cmds[i], line);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* not acting on matches or line numbers. act on every line */
|
||||||
|
else
|
||||||
|
line_altered += do_sed_command(&sed_cmds[i], line);
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
/* we will print the line unless we were told to be quiet or if the
|
||||||
|
* line was altered (via a 'd'elete or 's'ubstitution) */
|
||||||
|
if (!be_quiet && !line_altered)
|
||||||
|
fputs(line, stdout);
|
||||||
|
|
||||||
|
free(line);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
extern int sed_main(int argc, char **argv)
|
extern int sed_main(int argc, char **argv)
|
||||||
{
|
{
|
||||||
FILE *fp;
|
int opt;
|
||||||
char *needle = NULL, *newNeedle = NULL;
|
|
||||||
char *name;
|
|
||||||
char *cp;
|
|
||||||
int ignoreCase = FALSE;
|
|
||||||
int printFlag = FALSE;
|
|
||||||
int quietFlag = FALSE;
|
|
||||||
int stopNow;
|
|
||||||
char *line_s = NULL, saved;
|
|
||||||
char *appendline = NULL;
|
|
||||||
char *pos;
|
|
||||||
sed_function sed_f = f_none;
|
|
||||||
|
|
||||||
argc--;
|
/* do special-case option parsing */
|
||||||
argv++;
|
if (argv[1] && (strcmp(argv[1], "--help") == 0))
|
||||||
if (argc < 1) {
|
|
||||||
usage(sed_usage);
|
usage(sed_usage);
|
||||||
}
|
|
||||||
|
|
||||||
while (argc > 1) {
|
/* do normal option parsing */
|
||||||
if (**argv != '-')
|
while ((opt = getopt(argc, argv, "Vhne:f:")) > 0) {
|
||||||
|
switch (opt) {
|
||||||
|
case 'V':
|
||||||
|
printf("Print Busybox version here\n");
|
||||||
|
exit(0);
|
||||||
|
break;
|
||||||
|
case 'h':
|
||||||
usage(sed_usage);
|
usage(sed_usage);
|
||||||
argc--;
|
break;
|
||||||
cp = *argv++;
|
|
||||||
stopNow = FALSE;
|
|
||||||
|
|
||||||
while (*++cp && stopNow == FALSE) {
|
|
||||||
switch (*cp) {
|
|
||||||
case 'n':
|
case 'n':
|
||||||
quietFlag = TRUE;
|
be_quiet++;
|
||||||
break;
|
break;
|
||||||
case 'e':
|
case 'e':
|
||||||
if (*(cp + 1) == 0 && --argc < 0) {
|
add_cmd_str(optarg);
|
||||||
usage(sed_usage);
|
break;
|
||||||
|
case 'f':
|
||||||
|
load_cmd_file(optarg);
|
||||||
|
break;
|
||||||
|
}
|
||||||
}
|
}
|
||||||
if (*++cp != 's')
|
|
||||||
cp = *argv++;
|
|
||||||
|
|
||||||
/* Read address if present */
|
/* if we didn't get a pattern from a -e and no command file was specified,
|
||||||
SKIPSPACES(cp);
|
* argv[optind] should be the pattern. no pattern, no worky */
|
||||||
if (*cp == '$') {
|
if (ncmds == 0) {
|
||||||
addr_line = LAST_LINE;
|
if (argv[optind] == NULL)
|
||||||
cp++;
|
usage(sed_usage);
|
||||||
|
else {
|
||||||
|
add_cmd_str(argv[optind]);
|
||||||
|
optind++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/* argv[(optind)..(argc-1)] should be names of file to process. If no
|
||||||
|
* files were specified or '-' was specified, take input from stdin.
|
||||||
|
* Otherwise, we process all the files specified. */
|
||||||
|
if (argv[optind] == NULL || (strcmp(argv[optind], "-") == 0)) {
|
||||||
|
process_file(stdin);
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
int i;
|
||||||
|
FILE *file;
|
||||||
|
for (i = optind; i < argc; i++) {
|
||||||
|
file = fopen(argv[i], "r");
|
||||||
|
if (file == NULL) {
|
||||||
|
fprintf(stderr, "sed: %s: %s\n", argv[i], strerror(errno));
|
||||||
} else {
|
} else {
|
||||||
if (isdigit(*cp)) { /* LINE ADDRESS */
|
process_file(file);
|
||||||
line_s = cp;
|
fclose(file);
|
||||||
while (isdigit(*cp))
|
|
||||||
cp++;
|
|
||||||
if (cp > line_s) {
|
|
||||||
/* numeric line */
|
|
||||||
saved = *cp;
|
|
||||||
*cp = '\0';
|
|
||||||
addr_line = atoi(line_s);
|
|
||||||
*cp = saved;
|
|
||||||
}
|
|
||||||
} else if (*cp == '/') { /* PATTERN ADDRESS */
|
|
||||||
pos = addr_pattern = cp + 1;
|
|
||||||
pos = strchr(pos, '/');
|
|
||||||
if (!pos)
|
|
||||||
usage(sed_usage);
|
|
||||||
*pos = '\0';
|
|
||||||
cp = pos + 1;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
SKIPSPACES(cp);
|
|
||||||
if (*cp == '!') {
|
|
||||||
negated++;
|
|
||||||
cp++;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Read command */
|
|
||||||
|
|
||||||
SKIPSPACES(cp);
|
|
||||||
switch (*cp) {
|
|
||||||
case 's': /* REPLACE */
|
|
||||||
if (strlen(cp) <= 3 || *(cp + 1) != '/')
|
|
||||||
break;
|
|
||||||
sed_f = f_replace;
|
|
||||||
|
|
||||||
pos = needle = cp + 2;
|
|
||||||
|
|
||||||
for (;;) {
|
|
||||||
pos = strchr(pos, '/');
|
|
||||||
if (pos == NULL) {
|
|
||||||
usage(sed_usage);
|
|
||||||
}
|
|
||||||
if (*(pos - 1) == '\\') {
|
|
||||||
pos++;
|
|
||||||
continue;
|
|
||||||
}
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
*pos = 0;
|
|
||||||
newNeedle = ++pos;
|
|
||||||
for (;;) {
|
|
||||||
pos = strchr(pos, '/');
|
|
||||||
if (pos == NULL) {
|
|
||||||
usage(sed_usage);
|
|
||||||
}
|
|
||||||
if (*(pos - 1) == '\\') {
|
|
||||||
pos++;
|
|
||||||
continue;
|
|
||||||
}
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
*pos = 0;
|
|
||||||
if (pos + 2 != 0) {
|
|
||||||
while (*++pos) {
|
|
||||||
switch (*pos) {
|
|
||||||
case 'i':
|
|
||||||
ignoreCase = TRUE;
|
|
||||||
break;
|
|
||||||
case 'p':
|
|
||||||
printFlag = TRUE;
|
|
||||||
break;
|
|
||||||
case 'g':
|
|
||||||
break;
|
|
||||||
default:
|
|
||||||
usage(sed_usage);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
cp = pos;
|
|
||||||
/* fprintf(stderr, "replace '%s' with '%s'\n", needle, newNeedle); */
|
|
||||||
break;
|
|
||||||
|
|
||||||
case 'a': /* APPEND */
|
|
||||||
if (strlen(cp) < 2)
|
|
||||||
break;
|
|
||||||
sed_f = f_append;
|
|
||||||
appendline = ++cp;
|
|
||||||
/* fprintf(stderr, "append '%s'\n", appendline); */
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
|
|
||||||
stopNow = TRUE;
|
|
||||||
break;
|
|
||||||
|
|
||||||
default:
|
|
||||||
usage(sed_usage);
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
if (argc == 0) {
|
exit_sed(0, NULL);
|
||||||
switch (sed_f) {
|
|
||||||
case f_none:
|
|
||||||
break;
|
|
||||||
case f_replace:
|
|
||||||
do_sed_repl(stdin, needle, newNeedle, ignoreCase, printFlag,
|
|
||||||
quietFlag);
|
|
||||||
break;
|
|
||||||
case f_append:
|
|
||||||
do_sed_append(stdin, appendline, quietFlag);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
while (argc-- > 0) {
|
|
||||||
name = *argv++;
|
|
||||||
|
|
||||||
fp = fopen(name, "r");
|
/* not reached */
|
||||||
if (fp == NULL) {
|
return 0;
|
||||||
perror(name);
|
|
||||||
continue;
|
|
||||||
}
|
|
||||||
|
|
||||||
switch (sed_f) {
|
|
||||||
case f_none:
|
|
||||||
break;
|
|
||||||
case f_replace:
|
|
||||||
do_sed_repl(fp, needle, newNeedle, ignoreCase, printFlag,
|
|
||||||
quietFlag);
|
|
||||||
break;
|
|
||||||
case f_append:
|
|
||||||
do_sed_append(fp, appendline, quietFlag);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (ferror(fp))
|
|
||||||
perror(name);
|
|
||||||
|
|
||||||
fclose(fp);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return(TRUE);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
|
#ifdef TEST_SED
|
||||||
/* END CODE */
|
int main(int argc, char **argv)
|
||||||
|
{
|
||||||
|
return sed_main(argc, argv);
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|||||||
773
sed.c
773
sed.c
@ -1,15 +1,8 @@
|
|||||||
/* vi: set sw=4 ts=4: */
|
|
||||||
/*
|
/*
|
||||||
* Mini sed implementation for busybox
|
* sed.c - very minimalist version of sed
|
||||||
*
|
|
||||||
*
|
*
|
||||||
* Copyright (C) 1999,2000 by Lineo, inc.
|
* Copyright (C) 1999,2000 by Lineo, inc.
|
||||||
* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
|
* Written by Mark Whitley <markw@lineo.com>, <markw@enol.com>
|
||||||
*
|
|
||||||
* Modifications for addresses and append command have been
|
|
||||||
* written by Marco Pantaleoni <panta@prosa.it>, <panta@elasticworld.org>
|
|
||||||
* and are:
|
|
||||||
* Copyright (C) 1999 Marco Pantaleoni.
|
|
||||||
*
|
*
|
||||||
* This program is free software; you can redistribute it and/or modify
|
* This program is free software; you can redistribute it and/or modify
|
||||||
* it under the terms of the GNU General Public License as published by
|
* it under the terms of the GNU General Public License as published by
|
||||||
@ -27,333 +20,543 @@
|
|||||||
*
|
*
|
||||||
*/
|
*/
|
||||||
|
|
||||||
#include "internal.h"
|
/*
|
||||||
#include "regexp.h"
|
Supported features and commands in this version of sed:
|
||||||
|
|
||||||
|
- comments ('#')
|
||||||
|
- Address matching: num|/matchstr/[,num|/matchstr/|$]command
|
||||||
|
- Commands: p, d, s/match/replace/[g]
|
||||||
|
|
||||||
|
(Note: Specifying an address (range) to match is *optional*; commands
|
||||||
|
default to the whole pattern space if no specific address match was
|
||||||
|
requested.)
|
||||||
|
|
||||||
|
Unsupported features:
|
||||||
|
|
||||||
|
- transliteration (y/source-chars/dest-chars/) (use 'tr')
|
||||||
|
- no support for characters other than the '/' character for regex matches
|
||||||
|
- no pattern space hold space storing / swapping (x, etc.)
|
||||||
|
- no labels / branching (: label, b, t, and friends)
|
||||||
|
- and lots, lots more.
|
||||||
|
|
||||||
|
*/
|
||||||
|
|
||||||
#include <stdio.h>
|
#include <stdio.h>
|
||||||
#include <dirent.h>
|
#include <stdlib.h> /* for realloc() */
|
||||||
|
#include <unistd.h> /* for getopt() */
|
||||||
|
#include <regex.h>
|
||||||
|
#include <string.h> /* for strdup() */
|
||||||
#include <errno.h>
|
#include <errno.h>
|
||||||
#include <fcntl.h>
|
#include <ctype.h> /* for isspace() */
|
||||||
#include <signal.h>
|
#include "internal.h"
|
||||||
#include <time.h>
|
|
||||||
#include <ctype.h>
|
|
||||||
|
/* externs */
|
||||||
|
extern int optind; /* in unistd.h */
|
||||||
|
extern char *optarg; /* ditto */
|
||||||
|
|
||||||
|
/* options */
|
||||||
|
static int be_quiet = 0;
|
||||||
|
|
||||||
|
struct sed_cmd {
|
||||||
|
|
||||||
|
/* address storage */
|
||||||
|
int beg_line; /* 'sed 1p' 0 == no begining line, apply commands to all lines */
|
||||||
|
int end_line; /* 'sed 1,3p' 0 == no end line, use only beginning. -1 == $ */
|
||||||
|
regex_t *beg_match; /* sed -e '/match/cmd' */
|
||||||
|
regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */
|
||||||
|
|
||||||
|
/* the command */
|
||||||
|
char cmd; /* p,d,s (add more at your leisure :-) */
|
||||||
|
|
||||||
|
/* substitution command specific fields */
|
||||||
|
regex_t *sub_match; /* sed -e 's/sub_match/replace/' */
|
||||||
|
char *replace; /* sed -e 's/sub_match/replace/' XXX: who will hold the \1 \2 \3s? */
|
||||||
|
unsigned int sub_g:1; /* sed -e 's/foo/bar/g' (global) */
|
||||||
|
};
|
||||||
|
|
||||||
|
/* globals */
|
||||||
|
static struct sed_cmd *sed_cmds = NULL; /* growable arrary holding a sequence of sed cmds */
|
||||||
|
static int ncmds = 0; /* number of sed commands */
|
||||||
|
|
||||||
|
/*static char *cur_file = NULL;*/ /* file currently being processed XXX: do I need this? */
|
||||||
|
|
||||||
static const char sed_usage[] =
|
static const char sed_usage[] =
|
||||||
"sed [-n] -e script [file...]\n"
|
"sed [-Vhnef] pattern [files...]\n"
|
||||||
#ifndef BB_FEATURE_TRIVIAL_HELP
|
#ifndef BB_FEATURE_TRIVIAL_HELP
|
||||||
"\nAllowed sed scripts come in the following form:\n"
|
"\n"
|
||||||
"\t'ADDR [!] COMMAND'\n\n"
|
"-n\tsuppress automatic printing of pattern space\n"
|
||||||
"\twhere address ADDR can be:\n"
|
"-e script\tadd the script to the commands to be executed\n"
|
||||||
"\t NUMBER Match specified line number\n"
|
"-f scriptfile\tadd the contents of script-file to the commands to be executed\n"
|
||||||
"\t $ Match last line\n"
|
"-h\tdisplay this help message\n"
|
||||||
"\t /REGEXP/ Match specified regexp\n"
|
"-V\toutput version information and exit\n"
|
||||||
"\t (! inverts the meaning of the match)\n\n"
|
"\n"
|
||||||
"\tand COMMAND can be:\n"
|
"If no -e or -f is given, the first non-option argument is taken as the\n"
|
||||||
"\t s/regexp/replacement/[igp]\n"
|
"sed script to interpret. All remaining arguments are names of input\n"
|
||||||
"\t which attempt to match regexp against the pattern space\n"
|
"files; if no input files are specified, then the standard input is read.\n"
|
||||||
"\t and if successful replaces the matched portion with replacement.\n\n"
|
|
||||||
"\t aTEXT\n"
|
|
||||||
"\t which appends TEXT after the pattern space\n"
|
|
||||||
"Options:\n"
|
|
||||||
"-e\tadd the script to the commands to be executed\n"
|
|
||||||
"-n\tsuppress automatic printing of pattern space\n\n"
|
|
||||||
#if defined BB_REGEXP
|
|
||||||
"This version of sed matches full regular expressions.\n";
|
|
||||||
#else
|
|
||||||
"This version of sed matches strings (not full regular expressions).\n"
|
|
||||||
#endif
|
|
||||||
#endif
|
#endif
|
||||||
;
|
;
|
||||||
|
|
||||||
/* Flags & variables */
|
#if 0
|
||||||
|
/* Nuke from here { */
|
||||||
|
|
||||||
typedef enum { f_none, f_replace, f_append } sed_function;
|
|
||||||
|
|
||||||
#define NO_LINE -2
|
/* get_line_from_file() - This function reads an entire line from a text file
|
||||||
#define LAST_LINE -1
|
* * up to a newline. It returns a malloc'ed char * which must be stored and
|
||||||
static int addr_line = NO_LINE;
|
* * free'ed by the caller. */
|
||||||
static char *addr_pattern = NULL;
|
extern char *get_line_from_file(FILE *file)
|
||||||
static int negated = 0;
|
|
||||||
|
|
||||||
#define SKIPSPACES(p) do { while (isspace(*(p))) (p)++; } while (0)
|
|
||||||
|
|
||||||
#define BUFSIZE 1024
|
|
||||||
|
|
||||||
static inline int at_last(FILE * fp)
|
|
||||||
{
|
{
|
||||||
int res = 0;
|
static const int GROWBY = 80; /* how large we will grow strings by */
|
||||||
|
|
||||||
if (feof(fp))
|
|
||||||
return 1;
|
|
||||||
else {
|
|
||||||
int ch;
|
int ch;
|
||||||
|
int idx = 0;
|
||||||
|
char *linebuf = NULL;
|
||||||
|
int linebufsz = 0;
|
||||||
|
|
||||||
if ((ch = fgetc(fp)) == EOF)
|
while (1) {
|
||||||
res++;
|
ch = fgetc(file);
|
||||||
ungetc(ch, fp);
|
if (ch == EOF)
|
||||||
|
break;
|
||||||
|
/* grow the line buffer as necessary */
|
||||||
|
if (idx > linebufsz-2)
|
||||||
|
linebuf = realloc(linebuf, linebufsz += GROWBY);
|
||||||
|
linebuf[idx++] = (char)ch;
|
||||||
|
if ((char)ch == '\n')
|
||||||
|
break;
|
||||||
}
|
}
|
||||||
return res;
|
|
||||||
|
if (idx == 0)
|
||||||
|
return NULL;
|
||||||
|
|
||||||
|
linebuf[idx] = 0;
|
||||||
|
return linebuf;
|
||||||
}
|
}
|
||||||
|
|
||||||
static void do_sed_repl(FILE * fp, char *needle, char *newNeedle,
|
static void usage(const char *string)
|
||||||
int ignoreCase, int printFlag, int quietFlag)
|
|
||||||
{
|
{
|
||||||
int foundOne = FALSE;
|
printf("usage: %s\n", string);
|
||||||
char haystack[BUFSIZE];
|
exit(0);
|
||||||
int line = 1, doit;
|
}
|
||||||
|
|
||||||
while (fgets(haystack, BUFSIZE - 1, fp)) {
|
/* } to here when we integrate this into busybox */
|
||||||
doit = 0;
|
#endif
|
||||||
if (addr_pattern) {
|
|
||||||
doit = !find_match(haystack, addr_pattern, FALSE);
|
|
||||||
} else if (addr_line == NO_LINE)
|
|
||||||
doit = 1;
|
|
||||||
else if (addr_line == LAST_LINE) {
|
|
||||||
if (at_last(fp))
|
|
||||||
doit = 1;
|
|
||||||
} else {
|
|
||||||
if (line == addr_line)
|
|
||||||
doit = 1;
|
|
||||||
}
|
|
||||||
if (negated)
|
|
||||||
doit = 1 - doit;
|
|
||||||
if (doit) {
|
|
||||||
foundOne =
|
|
||||||
replace_match(haystack, needle, newNeedle, ignoreCase);
|
|
||||||
|
|
||||||
if (foundOne == TRUE && printFlag == TRUE) {
|
static void destroy_cmd_strs()
|
||||||
fprintf(stdout, haystack);
|
{
|
||||||
|
if (sed_cmds == NULL)
|
||||||
|
return;
|
||||||
|
|
||||||
|
/* destroy all the elements in the array */
|
||||||
|
while (--ncmds >= 0) {
|
||||||
|
|
||||||
|
if (sed_cmds[ncmds].beg_match) {
|
||||||
|
regfree(sed_cmds[ncmds].beg_match);
|
||||||
|
free(sed_cmds[ncmds].beg_match);
|
||||||
}
|
}
|
||||||
|
if (sed_cmds[ncmds].end_match) {
|
||||||
|
regfree(sed_cmds[ncmds].end_match);
|
||||||
|
free(sed_cmds[ncmds].end_match);
|
||||||
|
}
|
||||||
|
if (sed_cmds[ncmds].sub_match) {
|
||||||
|
regfree(sed_cmds[ncmds].sub_match);
|
||||||
|
free(sed_cmds[ncmds].sub_match);
|
||||||
|
}
|
||||||
|
if (sed_cmds[ncmds].replace)
|
||||||
|
free(sed_cmds[ncmds].replace);
|
||||||
}
|
}
|
||||||
|
|
||||||
if (quietFlag == FALSE) {
|
/* destroy the array */
|
||||||
fprintf(stdout, haystack);
|
free(sed_cmds);
|
||||||
|
sed_cmds = NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void exit_sed(int retcode, const char *message)
|
||||||
|
{
|
||||||
|
destroy_cmd_strs();
|
||||||
|
if (message)
|
||||||
|
fputs(message, stderr);
|
||||||
|
exit(retcode);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* trim_str - trims leading and trailing space from a string
|
||||||
|
*
|
||||||
|
* Note: This returns a malloc'ed string so you must store and free it
|
||||||
|
* XXX: This should be in the utility.c file.
|
||||||
|
*/
|
||||||
|
static char *trim_str(const char *str)
|
||||||
|
{
|
||||||
|
int i;
|
||||||
|
char *retstr = strdup(str);
|
||||||
|
|
||||||
|
/* trim leading whitespace */
|
||||||
|
memmove(retstr, &retstr[strspn(retstr, " \n\t\v")], strlen(retstr));
|
||||||
|
|
||||||
|
/* trim trailing whitespace */
|
||||||
|
i = strlen(retstr) - 1;
|
||||||
|
while (isspace(retstr[i]))
|
||||||
|
i--;
|
||||||
|
retstr[++i] = 0;
|
||||||
|
|
||||||
|
/* Aside:
|
||||||
|
*
|
||||||
|
* you know, a strrspn() would really be nice cuz then we could say:
|
||||||
|
*
|
||||||
|
* retstr[strlen(retstr) - strrspn(retstr, " \n\t\v") + 1] = 0;
|
||||||
|
*/
|
||||||
|
|
||||||
|
return retstr;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* index_of_unescaped_slash - walks left to right through a string beginning
|
||||||
|
* at a specified index and returns the index of the next unescaped slash.
|
||||||
|
*/
|
||||||
|
static int index_of_next_unescaped_slash(int idx, const char *str)
|
||||||
|
{
|
||||||
|
do {
|
||||||
|
idx++;
|
||||||
|
/* test if we've hit the end */
|
||||||
|
if (str[idx] == 0)
|
||||||
|
return -1;
|
||||||
|
} while (str[idx] != '/' && str[idx - 1] != '\\');
|
||||||
|
|
||||||
|
return idx;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* returns the index in the string just past where the address ends.
|
||||||
|
*/
|
||||||
|
static int get_address(const char *str, int *line, regex_t **regex)
|
||||||
|
{
|
||||||
|
char *my_str = strdup(str);
|
||||||
|
int idx = 0;
|
||||||
|
|
||||||
|
if (isdigit(my_str[idx])) {
|
||||||
|
do {
|
||||||
|
idx++;
|
||||||
|
} while (isdigit(my_str[idx]));
|
||||||
|
my_str[idx] = 0;
|
||||||
|
*line = atoi(my_str);
|
||||||
|
*regex = NULL;
|
||||||
|
}
|
||||||
|
else if (my_str[idx] == '$') {
|
||||||
|
*line = -1;
|
||||||
|
*regex = NULL;
|
||||||
|
idx++;
|
||||||
|
}
|
||||||
|
else if (my_str[idx] == '/') {
|
||||||
|
int ret;
|
||||||
|
idx = index_of_next_unescaped_slash(idx, my_str);
|
||||||
|
if (idx == -1) {
|
||||||
|
free(my_str);
|
||||||
|
exit_sed(1, "sed: unterminated match expression\n");
|
||||||
|
}
|
||||||
|
my_str[idx] = 0; /* shave off the trailing '/' */
|
||||||
|
my_str++; /* shave off the leading '/' */
|
||||||
|
*regex = (regex_t *)malloc(sizeof(regex_t));
|
||||||
|
if ((ret = regcomp(*regex, my_str, 0)) != 0) {
|
||||||
|
/* error handling if regular expression couldn't be compiled */
|
||||||
|
int errmsgsz = regerror(ret, *regex, NULL, 0);
|
||||||
|
char *errmsg = malloc(errmsgsz);
|
||||||
|
if (errmsg == NULL) {
|
||||||
|
exit_sed(1, "sed: memory error\n");
|
||||||
|
}
|
||||||
|
regerror(ret, *regex, errmsg, errmsgsz);
|
||||||
|
fprintf(stderr, "sed: %s\n", errmsg);
|
||||||
|
free(errmsg);
|
||||||
|
exit_sed(1, NULL);
|
||||||
|
}
|
||||||
|
my_str--; /* move my_str back so free() (below) won't barf */
|
||||||
|
idx++; /* advance idx one past the end of the /match/ */
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
fprintf(stderr, "sed.c:get_address: no address found in string\n");
|
||||||
|
fprintf(stderr, "\t(you probably didn't check the string you passed me)\n");
|
||||||
|
idx = -1;
|
||||||
}
|
}
|
||||||
|
|
||||||
line++;
|
free(my_str);
|
||||||
|
return idx;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void parse_cmd_str(struct sed_cmd *sed_cmd, const char *cmdstr)
|
||||||
|
{
|
||||||
|
int idx = 0;
|
||||||
|
|
||||||
|
/* parse the command
|
||||||
|
* format is: [addr][,addr]cmd
|
||||||
|
* |----||-----||-|
|
||||||
|
* part1 part2 part3
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* first part (if present) is an address: either a number or a /regex/ */
|
||||||
|
if (isdigit(cmdstr[idx]) || cmdstr[idx] == '/')
|
||||||
|
idx = get_address(cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
|
||||||
|
|
||||||
|
/* second part (if present) will begin with a comma */
|
||||||
|
if (cmdstr[idx] == ',')
|
||||||
|
idx += get_address(&cmdstr[++idx], &sed_cmd->end_line, &sed_cmd->end_match);
|
||||||
|
|
||||||
|
/* last part (mandatory) will be a command */
|
||||||
|
if (cmdstr[idx] == '\0')
|
||||||
|
exit_sed(1, "sed: missing command\n");
|
||||||
|
if (!strchr("pds", cmdstr[idx])) /* <-- XXX add new commands here */
|
||||||
|
exit_sed(1, "sed: invalid command\n");
|
||||||
|
sed_cmd->cmd = cmdstr[idx];
|
||||||
|
/* special-case handling for 's' */
|
||||||
|
if (sed_cmd->cmd == 's') {
|
||||||
|
int oldidx;
|
||||||
|
/* format for substitution is:
|
||||||
|
* s/match/replace/g
|
||||||
|
* | |
|
||||||
|
* mandatory optional
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* verify that we have an 's' followed by a 'slash' */
|
||||||
|
if (cmdstr[++idx] != '/')
|
||||||
|
exit_sed(1, "sed: bad format in substitution expression\n");
|
||||||
|
|
||||||
|
/* get the substitution part */
|
||||||
|
idx += get_address(&cmdstr[idx], NULL, &sed_cmd->sub_match);
|
||||||
|
|
||||||
|
/* get the replacement part */
|
||||||
|
oldidx = idx;
|
||||||
|
idx = index_of_next_unescaped_slash(idx, cmdstr);
|
||||||
|
sed_cmd->replace = (char *)malloc(idx - oldidx + 1);
|
||||||
|
strncpy(sed_cmd->replace, &cmdstr[oldidx], idx - oldidx);
|
||||||
|
sed_cmd->replace[idx - oldidx] = 0;
|
||||||
|
|
||||||
|
/* store the 'g' if present */
|
||||||
|
if (cmdstr[++idx] == 'g')
|
||||||
|
sed_cmd->sub_g = 1;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
static void do_sed_append(FILE * fp, char *appendline, int quietFlag)
|
static void add_cmd_str(const char *cmdstr)
|
||||||
{
|
{
|
||||||
char buffer[BUFSIZE];
|
char *my_cmdstr = trim_str(cmdstr);
|
||||||
int line = 1, doit;
|
|
||||||
|
|
||||||
while (fgets(buffer, BUFSIZE - 1, fp)) {
|
/* if this is a comment, don't even bother */
|
||||||
doit = 0;
|
if (my_cmdstr[0] == '#') {
|
||||||
if (addr_pattern) {
|
free(my_cmdstr);
|
||||||
doit = !find_match(buffer, addr_pattern, FALSE);
|
return;
|
||||||
} else if (addr_line == NO_LINE)
|
|
||||||
doit = 1;
|
|
||||||
else if (addr_line == LAST_LINE) {
|
|
||||||
if (at_last(fp))
|
|
||||||
doit = 1;
|
|
||||||
} else {
|
|
||||||
if (line == addr_line)
|
|
||||||
doit = 1;
|
|
||||||
}
|
|
||||||
if (negated)
|
|
||||||
doit = 1 - doit;
|
|
||||||
if (quietFlag == FALSE) {
|
|
||||||
fprintf(stdout, buffer);
|
|
||||||
}
|
|
||||||
if (doit) {
|
|
||||||
fputs(appendline, stdout);
|
|
||||||
fputc('\n', stdout);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
line++;
|
/* grow the array */
|
||||||
|
sed_cmds = realloc(sed_cmds, sizeof(struct sed_cmd) * (++ncmds));
|
||||||
|
/* zero new element */
|
||||||
|
memset(&sed_cmds[ncmds-1], 0, sizeof(struct sed_cmd));
|
||||||
|
/* load command string into new array element */
|
||||||
|
parse_cmd_str(&sed_cmds[ncmds-1], my_cmdstr);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static void load_cmd_file(char *filename)
|
||||||
|
{
|
||||||
|
FILE *cmdfile;
|
||||||
|
char *line;
|
||||||
|
|
||||||
|
cmdfile = fopen(filename, "r");
|
||||||
|
if (cmdfile == NULL)
|
||||||
|
exit_sed(1, strerror(errno));
|
||||||
|
|
||||||
|
while ((line = get_line_from_file(cmdfile)) != NULL) {
|
||||||
|
line[strlen(line)-1] = 0; /* eat newline */
|
||||||
|
add_cmd_str(line);
|
||||||
|
free(line);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static int do_sed_command(const struct sed_cmd *sed_cmd, const char *line)
|
||||||
|
{
|
||||||
|
int altered = 0;
|
||||||
|
|
||||||
|
switch (sed_cmd->cmd) {
|
||||||
|
|
||||||
|
case 'p':
|
||||||
|
fputs(line, stdout);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case 'd':
|
||||||
|
altered++;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case 's': /* oo, a fun one :-) */
|
||||||
|
|
||||||
|
/* we only substitute if the substitution 'search' expression matches */
|
||||||
|
if (regexec(sed_cmd->sub_match, line, 0, NULL, 0) == 0) {
|
||||||
|
regmatch_t regmatch;
|
||||||
|
int i;
|
||||||
|
char *ptr = (char *)line;
|
||||||
|
|
||||||
|
while (*ptr) {
|
||||||
|
/* if we can match the search string... */
|
||||||
|
if (regexec(sed_cmd->sub_match, ptr, 1, ®match, 0) == 0) {
|
||||||
|
/* print everything before the match, */
|
||||||
|
for (i = 0; i < regmatch.rm_so; i++)
|
||||||
|
fputc(ptr[i], stdout);
|
||||||
|
/* then print the substitution in its place */
|
||||||
|
fputs(sed_cmd->replace, stdout);
|
||||||
|
/* then advance past the match */
|
||||||
|
ptr += regmatch.rm_eo;
|
||||||
|
/* and let the calling function know that something
|
||||||
|
* has been changed */
|
||||||
|
altered++;
|
||||||
|
|
||||||
|
/* if we're not doing this globally... */
|
||||||
|
if (!sed_cmd->sub_g)
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
/* if we COULD NOT match the search string (meaning we've gone past
|
||||||
|
* all previous instances), get out */
|
||||||
|
else
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* is there anything left to print? */
|
||||||
|
if (*ptr)
|
||||||
|
fputs(ptr, stdout);
|
||||||
|
}
|
||||||
|
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
return altered;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void process_file(FILE *file)
|
||||||
|
{
|
||||||
|
char *line = NULL;
|
||||||
|
static int linenum = 0; /* GNU sed does not restart counting lines at EOF */
|
||||||
|
unsigned int still_in_range = 0;
|
||||||
|
int line_altered;
|
||||||
|
int i;
|
||||||
|
|
||||||
|
/* go through every line in the file */
|
||||||
|
while ((line = get_line_from_file(file)) != NULL) {
|
||||||
|
|
||||||
|
linenum++;
|
||||||
|
line_altered = 0;
|
||||||
|
|
||||||
|
/* for every line, go through all the commands */
|
||||||
|
for (i = 0; i < ncmds; i++) {
|
||||||
|
|
||||||
|
/* are we acting on a range of matched lines? */
|
||||||
|
if (sed_cmds[i].beg_match && sed_cmds[i].end_match) {
|
||||||
|
if (still_in_range || regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0) {
|
||||||
|
line_altered += do_sed_command(&sed_cmds[i], line);
|
||||||
|
still_in_range = 1;
|
||||||
|
if (regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0)
|
||||||
|
still_in_range = 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* are we trying to match a single line? */
|
||||||
|
else if (sed_cmds[i].beg_match) {
|
||||||
|
if (regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0)
|
||||||
|
line_altered += do_sed_command(&sed_cmds[i], line);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* are we acting on a range of line numbers? */
|
||||||
|
else if (sed_cmds[i].beg_line > 0 && sed_cmds[i].end_line > 0) {
|
||||||
|
if (linenum >= sed_cmds[i].beg_line && linenum <= sed_cmds[i].end_line)
|
||||||
|
line_altered += do_sed_command(&sed_cmds[i], line);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* are we acting on a specified line number */
|
||||||
|
else if (sed_cmds[i].beg_line > 0) {
|
||||||
|
if (linenum == sed_cmds[i].beg_line)
|
||||||
|
line_altered += do_sed_command(&sed_cmds[i], line);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* not acting on matches or line numbers. act on every line */
|
||||||
|
else
|
||||||
|
line_altered += do_sed_command(&sed_cmds[i], line);
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
/* we will print the line unless we were told to be quiet or if the
|
||||||
|
* line was altered (via a 'd'elete or 's'ubstitution) */
|
||||||
|
if (!be_quiet && !line_altered)
|
||||||
|
fputs(line, stdout);
|
||||||
|
|
||||||
|
free(line);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
extern int sed_main(int argc, char **argv)
|
extern int sed_main(int argc, char **argv)
|
||||||
{
|
{
|
||||||
FILE *fp;
|
int opt;
|
||||||
char *needle = NULL, *newNeedle = NULL;
|
|
||||||
char *name;
|
|
||||||
char *cp;
|
|
||||||
int ignoreCase = FALSE;
|
|
||||||
int printFlag = FALSE;
|
|
||||||
int quietFlag = FALSE;
|
|
||||||
int stopNow;
|
|
||||||
char *line_s = NULL, saved;
|
|
||||||
char *appendline = NULL;
|
|
||||||
char *pos;
|
|
||||||
sed_function sed_f = f_none;
|
|
||||||
|
|
||||||
argc--;
|
/* do special-case option parsing */
|
||||||
argv++;
|
if (argv[1] && (strcmp(argv[1], "--help") == 0))
|
||||||
if (argc < 1) {
|
|
||||||
usage(sed_usage);
|
usage(sed_usage);
|
||||||
}
|
|
||||||
|
|
||||||
while (argc > 1) {
|
/* do normal option parsing */
|
||||||
if (**argv != '-')
|
while ((opt = getopt(argc, argv, "Vhne:f:")) > 0) {
|
||||||
|
switch (opt) {
|
||||||
|
case 'V':
|
||||||
|
printf("Print Busybox version here\n");
|
||||||
|
exit(0);
|
||||||
|
break;
|
||||||
|
case 'h':
|
||||||
usage(sed_usage);
|
usage(sed_usage);
|
||||||
argc--;
|
break;
|
||||||
cp = *argv++;
|
|
||||||
stopNow = FALSE;
|
|
||||||
|
|
||||||
while (*++cp && stopNow == FALSE) {
|
|
||||||
switch (*cp) {
|
|
||||||
case 'n':
|
case 'n':
|
||||||
quietFlag = TRUE;
|
be_quiet++;
|
||||||
break;
|
break;
|
||||||
case 'e':
|
case 'e':
|
||||||
if (*(cp + 1) == 0 && --argc < 0) {
|
add_cmd_str(optarg);
|
||||||
usage(sed_usage);
|
break;
|
||||||
|
case 'f':
|
||||||
|
load_cmd_file(optarg);
|
||||||
|
break;
|
||||||
|
}
|
||||||
}
|
}
|
||||||
if (*++cp != 's')
|
|
||||||
cp = *argv++;
|
|
||||||
|
|
||||||
/* Read address if present */
|
/* if we didn't get a pattern from a -e and no command file was specified,
|
||||||
SKIPSPACES(cp);
|
* argv[optind] should be the pattern. no pattern, no worky */
|
||||||
if (*cp == '$') {
|
if (ncmds == 0) {
|
||||||
addr_line = LAST_LINE;
|
if (argv[optind] == NULL)
|
||||||
cp++;
|
usage(sed_usage);
|
||||||
|
else {
|
||||||
|
add_cmd_str(argv[optind]);
|
||||||
|
optind++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/* argv[(optind)..(argc-1)] should be names of file to process. If no
|
||||||
|
* files were specified or '-' was specified, take input from stdin.
|
||||||
|
* Otherwise, we process all the files specified. */
|
||||||
|
if (argv[optind] == NULL || (strcmp(argv[optind], "-") == 0)) {
|
||||||
|
process_file(stdin);
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
int i;
|
||||||
|
FILE *file;
|
||||||
|
for (i = optind; i < argc; i++) {
|
||||||
|
file = fopen(argv[i], "r");
|
||||||
|
if (file == NULL) {
|
||||||
|
fprintf(stderr, "sed: %s: %s\n", argv[i], strerror(errno));
|
||||||
} else {
|
} else {
|
||||||
if (isdigit(*cp)) { /* LINE ADDRESS */
|
process_file(file);
|
||||||
line_s = cp;
|
fclose(file);
|
||||||
while (isdigit(*cp))
|
|
||||||
cp++;
|
|
||||||
if (cp > line_s) {
|
|
||||||
/* numeric line */
|
|
||||||
saved = *cp;
|
|
||||||
*cp = '\0';
|
|
||||||
addr_line = atoi(line_s);
|
|
||||||
*cp = saved;
|
|
||||||
}
|
|
||||||
} else if (*cp == '/') { /* PATTERN ADDRESS */
|
|
||||||
pos = addr_pattern = cp + 1;
|
|
||||||
pos = strchr(pos, '/');
|
|
||||||
if (!pos)
|
|
||||||
usage(sed_usage);
|
|
||||||
*pos = '\0';
|
|
||||||
cp = pos + 1;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
SKIPSPACES(cp);
|
|
||||||
if (*cp == '!') {
|
|
||||||
negated++;
|
|
||||||
cp++;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Read command */
|
|
||||||
|
|
||||||
SKIPSPACES(cp);
|
|
||||||
switch (*cp) {
|
|
||||||
case 's': /* REPLACE */
|
|
||||||
if (strlen(cp) <= 3 || *(cp + 1) != '/')
|
|
||||||
break;
|
|
||||||
sed_f = f_replace;
|
|
||||||
|
|
||||||
pos = needle = cp + 2;
|
|
||||||
|
|
||||||
for (;;) {
|
|
||||||
pos = strchr(pos, '/');
|
|
||||||
if (pos == NULL) {
|
|
||||||
usage(sed_usage);
|
|
||||||
}
|
|
||||||
if (*(pos - 1) == '\\') {
|
|
||||||
pos++;
|
|
||||||
continue;
|
|
||||||
}
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
*pos = 0;
|
|
||||||
newNeedle = ++pos;
|
|
||||||
for (;;) {
|
|
||||||
pos = strchr(pos, '/');
|
|
||||||
if (pos == NULL) {
|
|
||||||
usage(sed_usage);
|
|
||||||
}
|
|
||||||
if (*(pos - 1) == '\\') {
|
|
||||||
pos++;
|
|
||||||
continue;
|
|
||||||
}
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
*pos = 0;
|
|
||||||
if (pos + 2 != 0) {
|
|
||||||
while (*++pos) {
|
|
||||||
switch (*pos) {
|
|
||||||
case 'i':
|
|
||||||
ignoreCase = TRUE;
|
|
||||||
break;
|
|
||||||
case 'p':
|
|
||||||
printFlag = TRUE;
|
|
||||||
break;
|
|
||||||
case 'g':
|
|
||||||
break;
|
|
||||||
default:
|
|
||||||
usage(sed_usage);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
cp = pos;
|
|
||||||
/* fprintf(stderr, "replace '%s' with '%s'\n", needle, newNeedle); */
|
|
||||||
break;
|
|
||||||
|
|
||||||
case 'a': /* APPEND */
|
|
||||||
if (strlen(cp) < 2)
|
|
||||||
break;
|
|
||||||
sed_f = f_append;
|
|
||||||
appendline = ++cp;
|
|
||||||
/* fprintf(stderr, "append '%s'\n", appendline); */
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
|
|
||||||
stopNow = TRUE;
|
|
||||||
break;
|
|
||||||
|
|
||||||
default:
|
|
||||||
usage(sed_usage);
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
if (argc == 0) {
|
exit_sed(0, NULL);
|
||||||
switch (sed_f) {
|
|
||||||
case f_none:
|
|
||||||
break;
|
|
||||||
case f_replace:
|
|
||||||
do_sed_repl(stdin, needle, newNeedle, ignoreCase, printFlag,
|
|
||||||
quietFlag);
|
|
||||||
break;
|
|
||||||
case f_append:
|
|
||||||
do_sed_append(stdin, appendline, quietFlag);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
while (argc-- > 0) {
|
|
||||||
name = *argv++;
|
|
||||||
|
|
||||||
fp = fopen(name, "r");
|
/* not reached */
|
||||||
if (fp == NULL) {
|
return 0;
|
||||||
perror(name);
|
|
||||||
continue;
|
|
||||||
}
|
|
||||||
|
|
||||||
switch (sed_f) {
|
|
||||||
case f_none:
|
|
||||||
break;
|
|
||||||
case f_replace:
|
|
||||||
do_sed_repl(fp, needle, newNeedle, ignoreCase, printFlag,
|
|
||||||
quietFlag);
|
|
||||||
break;
|
|
||||||
case f_append:
|
|
||||||
do_sed_append(fp, appendline, quietFlag);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (ferror(fp))
|
|
||||||
perror(name);
|
|
||||||
|
|
||||||
fclose(fp);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return(TRUE);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
|
#ifdef TEST_SED
|
||||||
/* END CODE */
|
int main(int argc, char **argv)
|
||||||
|
{
|
||||||
|
return sed_main(argc, argv);
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|||||||
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Reference in New Issue
Block a user